Gravitational wave events
now in view pp. 282 & 301
Mouth bacteria cause
gut problems pp. 308 & 359
Nerves regulate tumor
angiogenesis pp. 305 & 321
$15
20 OCTOBER 2017
sciencemag.org
Genomes illuminate evolution and
crack secrets of silk and venom
pp. 288 & 293
A NEW SPIN ON
SPIDERS